Large Dragon, chaotic evil
Armor Class 18 (natural armor)
Hit Points 178 (17d10+85)
Speed fly +80, walk +40, climb +40
Challenge 10
Saving Throws cha +8, con +9, dex +4, wis +4
Skills stealth +4, perception +8
Damage Immunities fire
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 18
Languages Common, Draconic
Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 3 (1d6) fire damage.
Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.
Fire Breath (Recharge 5-6). The dragon exhales fire in a 30-foot cone. Each creature in that area must make a DC 17 Dexterity saving throw, taking 56 (16d6) fire damage on a failed save, or half as much damage on a successful one.
Source: 5e Core Rules · OGL/Open